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diff --git a/setjmp/setjmp.h b/setjmp/setjmp.h
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+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/*
+ *	ANSI Standard: 4.6 NON-LOCAL JUMPS <setjmp.h>
+ */
+
+#ifndef	_SETJMP_H
+
+#define	_SETJMP_H	1
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* Get the machine-dependent definition of `__jmp_buf'.  */
+#include <jmp_buf.h>
+#include <sigset.h>		/* Get `__sigset_t'.  */
+
+/* Calling environment, plus possibly a saved signal mask.  */
+typedef struct
+  {
+    /* NOTE: The machine-dependent definitions of `__sigsetjmp'
+       assume that a `jmp_buf' begins with a `__jmp_buf'.
+       Do not move this member or add others before it.  */
+    __jmp_buf __jmpbuf;		/* Calling environment.  */
+    int __mask_was_saved;	/* Saved the signal mask?  */
+    __sigset_t __saved_mask;	/* Saved signal mask.  */
+  } jmp_buf[1];
+
+
+/* Store the calling environment in ENV, also saving the
+   signal mask if SAVEMASK is nonzero.  Return 0.
+   This is the internal name for `sigsetjmp'.  */
+extern int __sigsetjmp __P ((jmp_buf __env, int __savemask));
+
+#ifndef	__FAVOR_BSD
+/* Set ENV to the current position and return 0, not saving the signal mask.
+   This is just like `sigsetjmp (ENV, 0)'.
+   The ANSI C standard says `setjmp' is a macro.  */
+#define	setjmp(env)	__sigsetjmp ((env), 0)
+#else
+/* We are in 4.3 BSD-compatibility mode in which `setjmp' 
+   saves the signal mask like `sigsetjmp (ENV, 1)'.  */
+#define	setjmp(env)	__sigsetjmp ((env), 1)
+#endif /* Favor BSD.  */
+
+#ifdef __USE_BSD
+/* Set ENV to the current position and return 0, not saving the signal mask.
+   This is the 4.3 BSD name for ANSI `setjmp'.  */
+#define _setjmp(env)	__sigsetjmp ((env), 0)
+#endif
+
+
+/* Jump to the environment saved in ENV, making the
+   `setjmp' call there return VAL, or 1 if VAL is 0.  */
+extern void longjmp __P ((jmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+#ifdef	__USE_BSD
+/* Same.  Usually `_longjmp' is used with `_setjmp', which does not save
+   the signal mask.  But it is how ENV was saved that determines whether
+   `longjmp' restores the mask; `_longjmp' is just an alias.  */
+extern void _longjmp __P ((jmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+#endif /* Use BSD.  */
+
+/* Internal machine-dependent function to restore context sans signal mask.  */
+extern void __longjmp __P ((__jmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+
+/* Internal function to possibly save the current mask of blocked signals
+   in ENV, and always set the flag saying whether or not it was saved.
+   This is used by the machine-dependent definition of `__sigsetjmp'.
+   Always returns zero, for convenience.  */
+extern int __sigjmp_save __P ((jmp_buf __env, int __savemask));
+
+
+#ifdef	__USE_POSIX
+/* Use the same type for `jmp_buf' and `sigjmp_buf'.
+   The `__mask_was_saved' flag determines whether
+   or not `longjmp' will restore the signal mask.  */
+typedef jmp_buf sigjmp_buf;
+
+/* Store the calling environment in ENV, also saving the
+   signal mask if SAVEMASK is nonzero.  Return 0.  */
+#define	sigsetjmp(env, savemask)	__sigsetjmp ((env), (savemask))
+
+/* Jump to the environment saved in ENV, making the
+   sigsetjmp call there return VAL, or 1 if VAL is 0.
+   Restore the signal mask if that sigsetjmp call saved it.
+   This is just an alias `longjmp'.  */
+extern void siglongjmp __P ((sigjmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+#endif /* Use POSIX.  */
+
+__END_DECLS
+
+#endif /* setjmp.h  */